58 lines
1.4 KiB
Nix
58 lines
1.4 KiB
Nix
path: { pkgs, ... } @ args:
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let
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inherit (builtins)
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attrNames
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filter
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head
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isString
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listToAttrs
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map
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match
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readDir
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toPath
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toString;
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attrsToList = attrs: map (name: {
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inherit name;
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value = attrs."${name}";
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}) (attrNames attrs);
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isFile = s: s == "regular";
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isDir = s: s == "directory";
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joinPath = p: f: toPath ((toString p) + "/" + f);
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isNixFile = file:
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let res = match "(.*)\.nix" file;
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in if res == null then null else head res;
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filterNixFiles = dir:
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let files = filter (e: isFile e.value) dir;
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nixFiles = map (f: {
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# Name and value are intentionally flipped to get the
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# correct attribute set structure back out
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name = isNixFile f.name;
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value = f.name; # i.e. the path
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}) files;
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in filter (f: isString f.name) nixFiles;
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traverse = path: dir:
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let nixFiles = filterNixFiles dir;
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imported = map (f: {
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inherit (f) name;
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value = import (joinPath path f.value) args;
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}) nixFiles;
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dirs = map (d: {
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inherit (d) name;
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value = readTree (joinPath path d.name);
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}) (filter (e: isDir e.value) dir);
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in listToAttrs (imported ++ dirs);
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importOr = path: dir: f:
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if dir ? "default.nix"
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then import path args
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else f path (attrsToList dir);
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readTree = path: importOr path (readDir path) traverse;
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in readTree path
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